Nippon Telegraph and Telephone Corp (NTT) has developed an eco-friendly battery. They claim the battery can be disposed of in soil without harming the environment.
Conventional batteries contain zinc alloy, rare metals and other materials which are harmful to the environment. The eco-friendly battery contains fertilizer and natural elements which will not harm the soil.
To test if the battery is environmentally friendly, they smashed the battery into small pieces and buried the pieces in the soil next to a vegetable plant. The plant showed no adverse effects from the battery.
There is still a problem with the battery because it has limited capacity. They will continue to research to find ways to increase the capacity.
howstuffworks.com (Title photo)